Service manual

9-2013 9. Troubleshooting
20. Verify that the spark plug cables are secure on the spark plugs: reconnect or replace as
necessary.
21. Inspect ignition kill lead (J1-12) in the harness and at connector J1: repair or replace the
lead, terminal, or pins as necessary.
22. Measure the spark plug gap: set the gap or replace the spark plugs as necessary.
23. Verify ignition spark condition.
24. Inspect the spark plug leads, kill lead terminals at magnetos, and measure magneto air
gap: replace the terminals, set the gap, or replace the magnetos as necessary.
25. Measure temperature of the air intake and temperature rise across the generator set;
remove blockage or prevent air recirculation.
9.19 Governor Actuator Shutdown- Fault Code 19
Logic: Controller sensed governor actuator circuit open or shorted.
Possible Causes: Wire connections, governor actuator
Diagnosis & Repair:
1. Verify that the Last Fault is FC 19: Yes, continue diagnosis; No, troubleshoot actual last
fault.
2. Measure and verify governor actuator resistance. Replace as necessary.
3. Measure and verify governor wiring to the control. Replace or repair as necessary.
4. Disconnect the generator set control J1 connector, verify the J1 pins are fully inserted, and
inspect pin condition using the steps below:
• Use the test points of the tester tool #420-0603
• Use a mating pin connector, a pin gauge of the same size (.045") as the mating
control connector pin, or any suitable device that will not damage the inside contact
wipers of the pin socket
• Insert, repair, or replace the pins as necessary.
5. Reconnect the J1 connector and test run the generator set for fault occurrence: repair or
replace pins in the connector as necessary.
9.20 Governor Actuator Overload - Fault Code 22
Logic: Maximum governor output (PWM) for 10 continuous seconds while fuel pressure switch
open and current at 100%
Possible Causes: Generator set loads, wire connections, fuel supply, air fuel mixture, exhaust
system, governor actuator, ignition system
Diagnosis & Repair:
1. Verify that the Last Fault is FC 22: Yes, continue diagnosis; No, troubleshoot actual last
fault.
2. Measure AC current while running the generator set with loads: identify faulty or short
cycling loads or reduce loads as necessary.
A030A239 (Issue 10) 97